Plate handling mechanism for embossing machines



J. H. GRUVER March 8, 1949.

PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES w 14 Sheets-Sheet 1 Filed Oct. 24, 1946 INVENTOR. (/55 0% $111 March 8, 1949. J. H. GRUVER PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES Filed Oct. 24, 1946 14 Sheets-Sheet 2 [lug n 0 w pi 2 4 6 i l w a u l 4 2 m m w z r w 2 JI f 7 7 mu m m w m m h S a m r. 3 N m Fm}- w h K 8 K Mm. w w m m. an

ATTORNE Y5 J. H. -GRUVER March 8, 1949.

PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES 14 Shecs-Sheet 5 Filed Oct. 24, 1946 INVENTOR. Jo Av r21 vez' ATTORNEYS MarchS, 1949 J, 3 2,463,690

PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES Filed'o'ct. 24, 1946 l4 Sheets-Sheet 4 IN VEN TOR.

ATTORNEY J. H. GRUVER March 8,- 119491.:

PLATE HANDLING MECHANISM FOR EM'BOSSING MACHINES 14 Shee ts-Sheet 5 Fi l ed Oct. 24, 1946 iii! - INVENTOR. m/Zbnjfi' Gz'u v 21 BY 20 am W A TIO NEYS J. -H. GRUVER 7 March 8, 1949.

PLATE HANDLING MECHANISM FOR EMBOSSING MAGH INES I Filed 001;. 24, 1946 14 Sheets-Sheet 6 INVENTOR. g/b/m G211 v21 ATTORNEYS March 8, 1949. J. H. GRUVER PLATE HANDLING MECHANISM FOR- EMBOSSING MACHINES l4 Sheets-Sheet 7 Filed Oct. 24, 1946 INVENTOR. JED/Pr; Gfzl v2.1

' ATTOENEYQS' J. H. GRUVER March 8, 1949.

PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES Filed oct. 24, 1946 14 Sheets-Sheet 8 INVENTOR.

T'ZIVQZ A TTORNE Y3 J. H. GRUVER Mm'h s, 1949.

PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES l4 Sheets-Sheet 9 Filed Oct. 24, 1946 INVENTOR.

2/0/21? Graver ATTOQHEYJ March 8, 1949. J GRQVER 2,463,690

PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES Filed Oct. 24, 1946 14 Sheets-Sheet l0 WM. mm;

I INVENTOR. V Jo/m Graver .4 TTORHE Y6 J. H. GRUVER PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES l4 Sheets-Sheet 11 IN VEN TOR.

A TTOQNEQKS March 8, 1949.

Filed Oct. 24, 1946 J. H. GRUVER PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES l4 Sheets-Sheet 12 Filed Oct. 24, 1946 /23 4 I INVENTOR. Q/0/7r2 Gruv BY w H l A fro /v5 Y6 March 8; 1949:

H- GRUVER PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES Filed Oct. 24, 1946 14 Sheets-Sheet l3 INVENTOR. )9 G fan/e r I WWW A TTQRHE Ys J. H. GRUVER March 8, 1949.

PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES l4 Sheets-Sheet 14 Filed Oct. 24, 1946 INVENTOR.

Ar TOR/4E Y6 Patented Mar. 8, 1949 UNITED STATES ATENT OFFICE PLATE HANDLING MECHANISM FOR EMBOSSING MACHINES Application October 24, 1946, Serial No. 705,265

36 Claims. (01. 197-6.6)

This invention relates to embossing machines, and particularly to embossing machines of the kind that are adapted to emboss type characters on thin metal printing plates.

Embossing machines that are adapted to emboss type characters on thin metal printing plates are generally quite old, and in such machines a plurality of pairs of punches and dies are usually arranged for selective setting movement into an embossing position, and suitable means including a carriage are afforded for disposing a printing plate in such embossing position so that the selected punch and die maybe operated to produce an embossed type character upon the printing plate. Provision is made in such machines for character spacing and line spacing of the printing plate with respect to the embossing posi--' tion, and while the character spacing function is efieoted automatically in such machines, the line spacing is usually accomplished manually, An example of such an embossing machine will be found in the Duncan and Hubbard Patent No. 1,831,103, patented November 10, 1931, and an examination of such patent will disclose that the printing plates that are to be embossed in such a machine must be loaded and unloaded manually so that a considerable loss of time results from the manual loading and unloading operations as well as from the preliminary setting movements of the carriage that must be efiected in order to bring the carriage into proper position for accomplishment of such loading and unloading operations. Such loss of time is of course objectionable, and it is an important object of the present invention to enable the printing plates to be quickly and easily loaded and unloaded by mechanical means in an embossing machine of the aforesaid character. It will also be evident that in embossing machines as heretofore used, the unloading and loading operations were in each instance performed successively, and this has also resulted in loss of operating time, and to eliminate this time consuming sequence of operation, and enable the unloading and loading of printing plates to be accomplished concurrently is another important object of this invention.

In machines of the character to which this invention relates it has heretofore been the custom to perform the required operations such as loading of the plate, the setting of the carriage in its initial or starting position by a carriage return movement, the various line spacing movements, and the carriage release and the plate unloading and loading operations insuccession, and in most instances each such function or operation has been initiated manually and in some instances has been performed manually, and as a result of this relatively complicated sequence of manual operations, it has been impossible to obtain rapid operation and high production of such machines. It is therefore an important object of the present invention to enable such functions of an embossing machine to be successively and automatically performed where such functions are invariably related to each other, and further and related objects are to afford power-driven means for accomplishing the aforesaid functions, and to enable such power-driven means to be uperated by control means which enable such functions to be performed as early as possible in each machine cycle.

A further object of the present invention is to enable a plurality of mounting positions to be afforded forprinting plates on the carriage of such an embossing machine so that a plurality of printing plates may be mounted upon such a carriage, and a related object is to dispose such mounting positions at spaced points on a moveable Workholder so that printing plates carried on the workholder may be moved into an embossing position on the carriage in succession. A further and related object is to enable an indexing work-supporting head or holder to be utilized in an embossing machine of the character to which this invention relates, and to enable loading and unloading operations to be performed at different points about the periphery of such indexing workholder so as to thereby enable the loading and unloading operations to be performed concurrently.

- Objects related to the foregoing are to afford control means for indexing such workholders after the loading and unloading operations have been performed, and to relate such indexing means to the plate feeding mechanism which feeds the printing plates into position on the indexing workholder.

Further objects of the invention are to enable power operated plate handling and carriage control mechanism in such an embossing machine to be so constructed and arranged that either manual or automatic control of such mechanism may be readily accomplished, and to embody such mechanism as a unit that is adapted to be mounted on or removed bodily from the frame of an embossing machine without disturbance of the critical adjusted relationships of the various plate handling and carriage control mechanisms.

Other and further objects of the present invention will be apparent from the following description and. claims and are illustrated in the accompanying drawings which, by way of illustration, show a preferred embodiment of the present invention and the principle thereof and what I now consider to be the best mode in which I have contemplated applying that principle. Other embodiments of the invention embodying the same or equivalent principle may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the purview of the appended claims.

In the drawings:

Fig. 1 is a perspective view of an embossing machine embodying the features of the invention;

Fig. 2 is a plan view taken partially in section and illustrating the actuating and control mechanism employed in the embossing machine of Fig. 1;

Fig. 3 is a fragmental front elevational view illustrating one of the control clutches and the means whereby this clutch is governed;

Fig. 4 is a vertical sectional view illustrating the manner in which other clutches of the mechanism are interrelated;

Fig. 5 is a fragmentary plan view illustrating the plate feeding and ejecting means and the relationship of such means to the workholding turret;

Fig. 6 is an enlarged fragmental plan view showing further details of the turret upon which the printing plates are mounted;

Fig. 7 is a vertical sectional view taken substantially along the line 7'! of Fig. 6;

Fig. 7A is a plan sectional view taken substantially along the line "IA-1A of Fig. 7 and illustrating further details of the turret;

Fig. 7B is a vertical sectional view taken substantially along the line 1B1B of Fig. 7A;

Fig. 8 is a fragmentary side elevational view of the machine as viewed from the left in Fig. 1;

Fig. 9 is a fragmental front elevational view taken partially in section and illustrating the carriage release mechanism and line spacing mechanism;

Fig. 10 is a fragmentary vertical sectional view taken substantially along the line Ill-l0 of Fig. 2;

Fig. 11 is a fragmentary vertical sectional view illustrating the carriage return mechanism of the machine;

Fig. 12 is a vertical sectional view taken substantially along the line l2l2 in Fig. 11;

Fig. 13 is a fragmentary vertical elevational view illustrating the interrelationship between the carriage return mechanism and the plate feeding mechanism in attaining indexing movement of the workholding turret;

Fig. 14 is a fragmentary front elevational view illustrating the controlling connection between certain of the operatin clutches;

Fig. 15 is a view similar to Fig. 13 and showing other details of construction including the drive for the plate ejecting mechanism;

Fig. 16 and 17 are elevational views illustrating the details of one form of overload release mechanism employed in the machine;

Fig. 18 is an elevational View of another form of overload release mechanism employed in the machine;

Figs. 19 and 20 are side elevational views of the overload release mechanism of Fig. 18 and showing the parts thereof in different positions;

packer mechanism;

Fig. 21 is an end elevational view of the left hand end of the carriage;

Fig. 22 is an end elevational view of the right hand end of the carriage;

Fig. 23 is a vertical sectional view illustrating the form of one of the clutches;

Fig. 24 is a vertical sectional view taken substantially along the line 2424 of Fig. 25;

Fig. 25 is a sectional view taken substantially along the line 25-25 of Fig. 24;

Fig. 26 is a fragmentary vertical sectional view illustrating the plate ejectin mechanism;

Fig. 27 is a plan view of the packer mechanism which collects the finished printing plates;

Fig. 28 is a plan view of the plate ejecting mechanism and the collecting chute;

Fig. 29 is a vertical sectional view showing the relationship of the plate ejector chute and the and Fig. 30 is a vertical sectional view taken substantially along the line 30-30 of Fig. 29.

For purposes of disclosure the invention is herein illustrated as embodied in an embossing machine 50 of the general character disclosed in the aforesaid Duncan and Hubbard patent, and under and in accordance with the present invention, means are embodied in the embossing machine 50 for automatically feeding printing plates P from a magazine M and into position for the performance of the desired embossing operations thereon, and after the embossing operations have been completed the printing plates P are automatically discharged from the machine and are packed in a collecting magazine K, as shown in Fig. 1 of the drawings. The embossing machine 50, as shown in Fig. 1 of the drawings, embodies an upstanding frame 5| along the forward edge of which a keyboard 52 is provided, and this keyboard has a plurality of keys 53 and a space bar 548 for controlling operation of the machine in the manner disclosed in the aforesaid Duncan and Hubbard patent. In addition to the keys 53, the present machine also afiords a plurality of keys 54, 55, and 56 along one end edge of the keyboard whereby special operations or functions of the machine may be controlled by the operator as will hereinafter be explained in detail.

The embossing machine 50. embodies an upstanding frame 60, Figs. 1 and 2, that is of inverted generally U-shaped form, and within this frame there is mounted a rotatable die head structure 6| that is constantly rotated in a predetermined direction on a vertical shaft 6| A, Fig. 2, and this die head structure embodies opposed pairs of punches and dies which may be operated or moved toward each other so as to form an embossed type character on a printing plate P that is supported in embossing position between such selected pair of punches and dies. The rotating die head structure BI is constantly driven through a friction clutch as explained in the aforesaid Duncan and Hubbard patent, and this is accomplished through means including a flywheel 62, gearing 63, a shaft 64, and gearing 64A, Fig. 2, and when a particular pair of punches and dies is to be selected, a selected one of an annular series of stops is rendered effective through operation of the appropriate one of the keys 53, and when this is done the stop is effective to bring the die head 6i to rest with the selected punch and die pair in the embossing position. mechanism that is thus utilized for controlling the position of the die head 6| is preferably of the character disclosed in my co-pending application Serial No. 689,986, filed August 12, 1946, now Patent No. 2,444,292, dated June 29, 1948. As explained in the aforesaid Duncan and Hubbard patent as well as in my aforesaid copending application, the stopping of the die head 6] in a selected position is effective to institute operation of the embossing means, and upon the completion of the action of the embossing means, the mechanism is effective to cause an automatic character spacing movement of the carriage upon which the printing plate P is mounted and to restore the stop mechanism and the actuated key, and these aspects and features of the machine shown in the aforesaid Duncan and Hubbard patent are utilized in the present machine.

Under the present invention, however, the machine is provided with a different form of carriage, and this carriage is identified in Figs. 2 5, 6, '7, 11, 13, 14, 21 and 22 as the carriage 65, and the carriage 95 as herein shown is basically of the same general character as the carriage construction illustrated in my copending application Serial No. 710,269, filed November 16, 1946, now Patent No. 2,450,725, dated October 5, 1948. The carriage 95 is supported and guided by means including rollers 56 upon a supporting rail 69 that is extended across the forward face of the machine and is secured to the frame 69 as is disclosed in the aforesaid Duncan and Hubbard patent. The carriage 95 has a cross slide 70 mounted thereon for line spacing movement in a horizontal direction and transversely with respect to the path of movement of the carriage 65 and, as disclosed in my aforesaid copending application Serial No. 710,269, the carriage 95 has a cross slide 79 that is constantly urged in a forward or return direction by spring means and is actuated through line spacing movements in a rearward direction by means including an operating rocker l l and an actuating pawl 1 IA carried thereby. The cross slide 79 is releasably held in any adjusted line spacing position by means including a retaining pawl 12A. The carriage 65 is urged in a character spacing or right; hand direction by means including a spring drum M, Fig. 1, this spring drum being of the general character shown in the aforesaid Duncan and Hubbard patent, and the character spacing movements of the carriage under the biasing action of the spring drum 74 are controlled by an escapement mechanism 75 that cooperates with a character spacing rack 73 mounted on the carriage 05 as disclosed in my aforesaid copending application Serial No. 710,259. The escapement mechanism 75 includes two pawls that are operated to produce a character spacing movement of the carriage by means including a line spacing rod 79 that is generally similar to the line spacing rod utilized in the aforesaid Duncan and Hubbard patent. The escapement mechanism includes one pawl that is normally engaged with the rack 76, and when the carriage 65 is to be moved for setting purposes, this pawl may be disengaged through the medium of a rocking lever 80 that has its rear end underlying a roller 15A on the normally engaged pawl, as at 80A beyond the forward face of the carriage 65. The operation of the escapement mechanism, and of the escapement release lever 99 are described in detail in my copending application Serial No. 710,269.

When the carriage 65 is to be utilized in a machine of the character herein shown, the basic mechanism illustrated in my aforesaid copending application Serial No. 710,269 is modified so as to enable automatic operation thereof to be attained, and for this purpose a line spacing ball is pivotally mounted on bearing pins 86 that are extended from opposite ends of the carriage 65, and a link 88 is extended upwardly from the bail 85, at the right hand end thereof, Fig. 22, and is connected with the actuating rocker H which operates the pawl 7 IA to impart line spacing movements to the cross slide 70. The operation of the line spacing mechanism to attain a line spacing movement is effected by upward movement of the line spacing bail 85, and when the rotary shaft MB of the line spacing means has reached its new position, it is held in this position by the retaining pawl 12A.

The carriage 55 is also provided with a carriage release bail 99 that is pivoted on the pins 89, and a link 9! is extended upwardly from the left hand side portion of the bail 99 and is pivoted to the outer end 89A of the escapement release lever 89 so that when the bail 99 is rocked in a downward direction, the carriage escapement will be released so as to thereby enable the carriage 65 to return in a right hand direction under the influence of the spring drum 74 to a loading position in which it is illustrated in Fig. 5 of the drawings.

The carriage release bail 99 is also utilized to release the cross slide 79 for return movement to a forward or loading position, and this is accomplished by operation of a release rocker 72 with which the retaining pawl 72A is associated. Thus a link 99 connects the bail 99 with the rocker l2, and when the bail 99 is rocked downwardly, a tail portion 72C on the rocker 72 engages a pin 99 on the pawl 'HA, thereby to shift the pawl HA to a released position. At this same time, the rocking movement of the rocker l2 acts through a pin and slot connection 1213 to withdraw the pawl 12A to a released position so as to thereby free the cross slide 19 for forward movement under the influence of its biasing spring.

Inwardly of the bail 85, a third bail 92 is provided which is mounted on the pins 85, and the arms of the bail 92 are extended rearwardly beyond the pivot pins 89, and the right hand arm of the bail 92 has an operating roller I99 thereon that is utilized in an automatic carriage return operation of the mechanism to release the escapement 75 while the carriage 65 is being returned to its left hand position. As the rear end of the left hand arm of the bail 92 a roller l0l is mounted as shown in Figs. 2 and 21, and this roller is utilized, as will hereinafter be described, in effecting automatic restoring of the escapement mechanism 75 when the carriage return movement has been completed.

As will be evident in Fig. 2, and in my aforesaid copending application Serial No. 710,269, the inner or rear end of the escapement release lever 89 is elongated in a direction parallel to the rail 98 so as to underlie the roller 75A in all normal positions of the carriage 65, and this inner end of the lever 99 has its left hand end extending outwardly at 803 over the left hand arm of the bail 92. The left hand arm of the bail 92 has an upstanding bar 94 fixed thereon which engages the lower face of the end 89B, and hence by upward rocking of the roller (99, the bar 94 is effective to release the escapement. A spring 800 acting on the lever 89 serves to hold the lever 89 and the bail 92 in the position shown in Fig. 21. It will be evident that the bail 92 will need to be operated in certain cycles of the machine to release the escapement 15 without releasing the 7 cross slide 10, and to enable this to be done, the lower end of the link 9| is connected to the ball 90 by means of a slot 9IA, Fig. 21.

Under and in accordance with the present invention the various mechanisms for handling and shifting the printing plates P are mounted upon a unitary structure that may be put in place upon or removed from the frame of the embossing machine as a unit, thereby to enable these operations to be performed without disturbing the critical adjustments and relationships of the several mechanisms of the unit. To this end a base plate I is provided for the plate handling unit which may rest upon the frame of the machine just rearwardly of the keyboard, and this plate I05 is rigidly associated with the rail 68 by means of brackets I06 and I01 disposed at opposite ends of the plate I05, as shown in Fig. 5. Thus the bracket I06 at the left hand end of the plate I05 has an upstanding portion I06R at its rear end which is rigidly secured to the left hand end portion of the rail 68. The bracket I01 is U-shaped in form so that one arm portion thereof may be secured to the top of the base plate I05 near the right hand end thereof, and the bottom of the U extends upwardly adjacent to the rear edge of the plate I05 and is rigidly secured by screws I08 to the right hand end portion of the rail 68. Thus the upper arm of the Ushaped bracket I01 extends forwardly and affords a base plate IIO upon which the magazine M is supported.

The present invention also provides for the support of a plurality of printing plates P on the cross slide 10, thereby to enable the plate loading and plate ejecting operations to be performed concurrently, and to this end an indexing turret H5 is mounted on a vertical stud I I6 disposed centrally of the cross slide 10. The turret II5 includes a relatively large circular plate II1 having a central bearing sleeve II8 that surrounds the stud I I6, and an upper actuating plate I of square form, is supported on and above the plate II1 by studs I2I for purposes that will appear hereinafter. A pair of nuts I23 on the stud I I6, Fig. 6, hold the turret H5 in position on the cross slide.

About the periphery of the circular plate Ill, a plurality of work supporting stations WS are afforded so that printing plates P may be supported in any one of such work supporting stations. In the present instance, the work supporting plate II1 has four work supporting stations 'WS formed thereabout at equally spaced locations, and each such position is defined in part by a rectangular opening I25, the long edges of which are perpendicular to the radius that passes through or across the central portion of such opening from the center of the mounting stud II6, as shown in Figs. 6 and '7. Along the outer edge of each opening I25, a retaining plate I26 is secured by rivets I21 to the top of a spacer plate I28, thereby to form a groove I23 in which one edge of a printing plate P may be disposed. Along the inner edge of each of the openings I25, a similar groove for the opposite edge of the printing plate P is afforded, and this is accomplished by means of a square plate I30 that is spaced upwardly from the plate H1 in the same amount as the plates I26. Beneath each edge of the plate I30, an elongated retaining pawl I32 is pivotally mounted, each such pawl I32 being pivoted as at I33 near one end of the opening I25 with which it is associated. The other end of each pawl is provided with a tooth I34 that projects into the groove that is formed between the plate I30 and the plate H1, and the tooth I34 in each instance has sloping edge surfaces on each side thereof. Thus a printing plate may be moved into the end of the grooves beneath the plates I26 and I30 and past the tooth I 34, such tooth being normally urged outwardly of said groove to the position shown in Fig. 6 by means of a spring I35. It will be observed that the plate I30 is spaced from the plate II1 by means of spacer plates I36 that are disposed adjacent to the several corners of the plate I30. When a printing plate P has been moved endwise into position over one of the openings I25, it comes to rest with its leading end edge in engagement with a stop pin I31 and when that position has been reached, the tooth I34 moves back into the grooves so as to thereby engage the trailing end edge of the plate P and hold the same yieldingly in position over the opening I25. To facilitate the inserting movement that is thus required, the end edge of the spacer plate I28 that is adjacent to the tooth I34 is beveled as indicated at IZBa.

The angular surface on the other side of the tooth I 34A at each work supporting station comes into play in the ejection of a completed printing plate P from the work supporting station, and in this regard it will be observed that the plate is moved endwise away from the stop pin I31 so as to cam the tooth I34 out of the retaining groove, thereby to permit endwise ejection of the completed plate P.

When the carriage 65 is in its right hand or loading position shown in Figs. 5 and 6, the forward one of the work supporting stations of the turret is disposed opposite and in alignment with the discharge side of the magazine M so that the lowermost printing plate in the magazine may be moved endwise out of the magazine and into position in this most forward work supporting station of the turret. Thus as will be evident in Figs. 1, 5, 6, 7, 13 and 15, the base plate IIO that supports the magazine M has an arcuately cut away corner IIOA at its left hand rearward side so that the arcuate adjacent edge of the turret II5 may move into the position shown in Fig. 6. The supporting plate I I0 is in turn provided with a plate feeding slide I40 that is reciprocable beneath the bottom of the magazine M through a guideway I4I, Fig. 6, and onto the top of the plate I I1, and in such movement the forward end edges of the plate P engage the surfaces I28A and the tooth I34 so as to move into position under the retaining plates and over the opening I25.

A printing plate P that is thus loaded onto the turret H5 at the forward edge of the turret is advanced into embossing position by rotative movement of the turret, and means are afforded for accurately locating the turret H5 in any one of four indexed positions. Thus as will be evident in Figs. 6 and 7, the plate II1 has an annular ring I43 secured on the lower face thereof by means including the bolts I2I, and this ring has tapered or angular notches I44 formed therein at spaced points. The notches I44 are disposed at intervals, and a spring pressed positioning pawl I41 is pivoted on the cross slide 10 at I48 so that a tooth I41A on the pawl I41 may be engaged with any aligned one of the notches I44. A spring I40 acts on the opposite end of the pawl I41 to urge the pawl I41 into its effective position, and when turning forces are applied to the turret, the pawl I 41 is cammed outwardly while the indexing movement is being accomplished, and

at the end of a 90 index movement the tooth I41 moves into position in the next notch I44, thereby to dispose the turret I I so that the plate P carried at the rear work supporting position of the turret is accurately disposed in embossing position. Thus it will be clear that when a printing plate has been loaded onto the turret H5 at the forward work supporting position thereof, the next indexing movement of the turret in a counterclockwise direction, Fig. 6, will dispose this particular plate in the right hand work supporting position of Fig. 6, and this particular printing plate will not be moved into the embossing position until the next indexing movement of the turret II5.

After completion of the required embossing operation upon a plate P in the embossing position, this plate is moved by a further indexing movement of the turret to a left hand position, Fig. 6, which constitutes an ejecting position, and after the turret has positioned a finished plate in this ejecting position, means are rendered effective for ejecting the finished plate from the turret II5. This is accomplished by moving the completed printing plate endwise in a forward direction, that is away from the stop pin I31, and in such ejecting movement the completed printing plate P is moved into a discharge chute I52 so that the printing plate may drop downwardly into an operative relationship with respect to a packer mechanism I53 that is associated with the collecting means K as will hereinafter be described. Thus the chute I52 is afforded by a pair of spaced plates I55 that diverge in an upward direction and are connected together by end walls I56. A bracket I51 extends to the left, Fig. 1, from the bracket I56 and serves to support the chute I52 with the upper end thereof disposed in substantial alignment with the left hand work supporting station of the turret H5, and the chute I52 has a cover plate I58 associated therewith on which an entry throat I59, Fig. 6, is provided. This entry throat is somewhat flared so as to insure entry of the leading end of a printing plate as it is discharged forwardly from the ejecting position of the turret, and the lower wall of the entry throat I59 terminates in an edge I59A, Fig. 6, at which point the falling movement of the printing plate down the chute I52 is to take place. Moreover, the left hand wall I55 of the chute I52 has a horizontal ledge I5I extended therealong and extending to the right so that when a plate is moved endwise through the throat I59 and into the chute I52, the left hand edge of the plate P will be continuously supported and hence when the trailing edge of the plate P moves oil? of the edge I59A, the right hand side edge of the plate P will then be unsupported and will tend to fall in a downward direction into the chute I52. Thus the printing plate falls edgewise through the chute and comes to rest upon a packing slide I64 that extends into and is slidable through an opening I65 formed through the walls I55 of the chute. When a plate P drops downwardly onto the slide I54, it is disposed somewhat above the slot I65 and is thus supported substantially in a vertical position. In the course of a packing movement, the slide I64 is withdrawn to the left, Fig. 30, by means that will be hereinafter described, and when this occurs, the plate P drops downwardly just to the right of the right hand end of the slide I64. The slide I64 thus holds the plate against tipping to the left, Fig. 30, and a pair of spring retaining arms I66 are disposed against the right hand surfaces of the plate to prevent tipping thereof in a right hand direction. The movement of the slide I64 is thereupon reversed and the plate is forced to the right, Figs. 27 and 30 to thereby separate the arms I56 against the action of a spring I61, and when this is done, the plate is moved into position in contact with the previously discharged printing plate. In this respect it should be pointed out that slots in the ends of the plate P are in such a packing movement moved into embracing relation with respect to guide rails I59 that are afforded along the side edges of the collector K. A sliding weight I10 disposed in the collector K holds the group of plates in a substantially vertical position and serves yieldingly to oppose the packing movement of the slide I64.

The ejecting movements are imparted to the plate P in the ejecting position of the turret by means of a swingable ejecting arm I15 that is pivoted on a mounting stud I16 carried on a horizontal mounting plate I11 that extends across the top of the front and rear bearing portions IMF and IllBR of the bracket I66. The ejecting arm I15 is thus capable of movement about a vertical axis by means that will be described presently, and at a point spaced to the right, Fig. 1, from the pivot, a stationary supporting bar I18 is disposed so that the ejecting arm I15 may be supported in a sliding relation upon the bar I18. The right hand end of the ejecting arm I15 has a spring pressed ejecting pawl I15A mounted thereon, and this ejecting pawl A has a tooth I15B, Fig. 26, that is arranged, in the rearward movement of the pawl 115A, to ride along or over the upper face of the printing plate that is in ejecting position. As the ejecting lever reaches the rear end of its movement, the tooth I15B drops down over the rear edge of the printing plate that is disposed in ejecting position, and upon reversal of movement of the ejecting arm I15, the tooth I15B engages the rear edge of the printing plate and the printing plate is moved away from the stop pin I31 and in a forward or ejecting direction so as to enter the throat I59 of the chute I52. In this connection it will be observed that the upper wall of the throat I59 is suitably slotted to afford clearance for the pawl I15A in the terminal portion of the ejecting movement thereof.

It will be observed that while the ejecting arm I15 is thus displaced from its normal or home position, the plate loading operation of the plate feeding slide I46 takes place, as will hereinafter be described in detail, and since the carriage 65 is held in its loading position by spring means, means affording a positive reaction for the plate loading forces are also provided. Such means are rendered effective by the plate ejecting arm I15, and to this end a retaining arm I19 is pivot ed at I19A on a vertical axis on the plate I11 somewhat forwardly and'to the right of the pivot I16. The lever I19 has an upstanding arm I163, Fig. 15, formed thereon which lies in the path of forward movement of a bracket 118B formed on the arm I15. Thus the arm I15 moves the arm I19 to its forward position of Fig. 5 at the end of a plate ejecting operation, such action being against the tension of a spring I190, Fig. 5. With the above described structure, this arm I15 follows the arm I15 rearwardly as it starts on a plate ejecting cycle, and in the course of such movement a notch I19D in the right hand end of the lever I19, Fig. 5, moves into engagement with the left forward corner of the carriage 55, Fig. 5. Thus, the shoulder afforded by the notch I'I9D holds the carriage 65 against the left hand plate loading forces exerted by the plate loading slide I40. The retaining arm I79 is of course returned to its ineffective position after the plate loading and ejecting operations have been completed, thereby to condition the parts for the carriage return movements.

After a, plate loading and plate ejecting operation has been performed with the carriage 65 in its right hand or loading position, the carriage must of course be returned to the left to a proper starting position, and this return movement of the carriage 65 is utilized under the present invention in causing the desired indexing movement of the turret II5. Thus as will be evident in Figs. 1, 6, 7, 13, and 14, the actuating plate I20 of the turret has four upstanding rollers I88 provided thereon adjacent the respective corners of the plate I20. When the carriage 04 is disposed in its right hand or loadin position, and prior to the time when the return movement is to be initiated, means are rendered effective to engage one of the rollers I80, thereby to hold or restrain the forward edge of the turret H5 against return movement, and thus when the carriage 65, and the pivot pin H6 that is carried thereby, are returned to the left, the turret H5 is caused to rotate in a counterclockwise direction as viewed in Fig. 6. The restraining means that are thus utilized in attaining the desired indexing movement of the turret II5 are afforded in the present instance by a restraining lever I82 that is pivoted on a horizontal pivot pin I 83 that is extended rearwardly from the magazine M near the lower end thereof. The left hand end of the lever I82 has a downwardly extending lug I85 at its left hand end, this lug being relatively long in a front to rear direction so as to afford a plate surface for rolling engagement by the roller I80 as the turning movement of the turret II5 progresses.

The right hand end of the lever I82 is bent downwardly at I82A and is then bent in a hori zontal direction at I82B and a relatively long bolt I86 is extended downwardly through an opening in the portion I82B and is anchored in the plate I I0. Above the portion I823 an expansive coil spring I8I acts between the head of the bolt I86 and the portion H323, and this tends normally to rock the lever I 82 in a clockwise direction to an inactive position wherein the lug I85 of the arm is out of the path of the upstanding rollers I80. This retracted position is shown in dotted outline in Fig. 7 of the drawings, and when the lever I82 is in this retracted position, the carriage 85 may be moved back and forth along the rail 68 for the normal carriage return purposes without causing indexing of the turret H5. When however the turret H5 is to be indexed after the performance of a plate loading operation, the restraining lever I82 is moved to its active position, and this is accomplished by an actuating rocker I88 that is pivoted at I89 on a mounting stud carried on the bracket I 01. The rocker I88 has an upwardly extending arm which acts with a camming action on the lower face of the portion I 823 of the lever I82 and when the rocker I88 is in its most clockwise position of Fig. 13, the restraining lever I82 is held in its active position. The rocker I88 has a relatively wide downwardly extending portion to which a spring I9I is connected so as to urge the rocker in a counterclockwise direction, Fig. 13, toward an inactive position, and when the rocker is moved to its active position, a latch I93 is urged by a spring I94 into engagement with a tooth I formed on the lower edge surface of the rocker I88. As will hereinafter be described in greater detail, the rocker I88 is moved to its effective position as an incident to the performance of the plate loading and ejecting operation, and the latch I93 holds the rocker I88 in its effective position during the carriage return operation and substantially at the end of the carriage return operation and after the indexing movement of the turret II5 has progressed to such a point that the tooth I4'IA is partially engaged with the next slot I44, the latch I93 is disengaged and the rocker I88 and the restraining arm I82 are caused to return to their inactive positions.

Under and in accordance with the present invention the carriage release bail 90, the escapement release bail 92, the line spacing bail 85, the printing device feeding and ejecting means, the carriage return means and the slide I64 of the packer are operated by power means, and selective control means are afforded whereby such power means may be rendered effective to cause operation of any of the aforesaid means at the proper time in the machine cycle. In afiording such selectively operable power driven means for operating the aforesaid mechanisms of the machine, a constantly driven operating shaft 200 is extended in a front to rear direction through the spaced upwardly extending elements IOBR and IMF of the bracket I06, and this shaft 200 at its rear end is supported by bearing means carried on an upstanding bearing plate 202. Just rearwardly of the bearing plate 202, the shaft 200 carries a gear 203 and this gear meshes with an idler pinion 204 carried on a bearing stud 205 mounted in the plate 202. The idler pinion 204 is meshed with a pinion 206 that is fixed on the rear end of the shaft 64. Such gearing is shown in Figs. 1, 2 and 10, and it will be evident that the operating shaft 200 is driven at a rate that is substantially less than the rate of rotation of the die shaft '6 IA.

Under the present invention the operating shaft 200 is selectively connectable to operating means that are effective to accomplish the several functions hereinabove enumerated, and for this purpose, five clutches of the one-revolution type are mounted on the shaft 200. Four of these clutches are identical in basic construction and are disposed on the shaft 200 between the upstanding portions IUBR and I0'BF of the bracket I 06, while the other of the five clutches is of a different construction and is designated in the drawings as clutch 208. The clutch 208 is disposed in an outboard relationship on the forward end of the shaft 200, and this clutch is utilized for controlling and operating the packer slide I84. Thus as is shown in Figs. 2 and 3 of the drawings, the clutch 208 comprises a generally cup-shaped driven member 208A that is rotatably mounted on the shaft 200 and has an eccentric 208E connected thereto. The eccentric 208E has a. band 208F arranged thereabout and this band has a connecting plate formed integrally therewith and pivoted at 209 to the slide I84 of the packer mechanism. Thus when the driven member 208A is rotated through a complete revolution, the packer slide I64 will be withdrawn in a left hand direction and is then returned in a right hand direction through a. plate-packing stroke so as to come to rest at the right hand end of this stroke. The clutch 208 has a driving member 2083 afforded by a hub pinned to the shaft 200 and having a plurality of equally 

